ich habe diese beschreibung schonmal in einem englischen forum gepostet, war jetzt nur zu faul den text nochmal zu übersetzen:
Highspeed FireFox
1. type in "about:config" (ohne leerzeichen zwischendrin) in the adressbar
2. double click on "network.http.pipelining" and "network.http.proxy.pipelining" so that it switch on "true"
3. double click on "network.http.pipelining.maxrequests" and insert the number "100"
4. right click somewhere on the screen, go an "new" -> "integer" and paste this name: "nglayout.initialpaint.delay" and after that insert "0"
5. enjoy your faster speed
i also made a tutorial movie